Total radiative capture rates for three- and four-nucleon pionic atoms

Journal Article · Mon Feb 01 04:00:00 EST 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.37.724· OSTI ID:5670292

Werntz, C; Valk, H S

A corrected closure approximation is used to calculate the reduced rates for radiative capture of negative pions from 1s and 2p orbitals in /sup 3/H, /sup 3/He, and /sup 4/He. For /sup 3/He and /sup 4/He the calculated rates are in good agreement with experimental data. In the case of /sup 3/H, the calculated value for 1s capture is combined with the measured radiative capture branching ratio to obtain a value of GAMMA/sub tot//sup 1//sup s/ = 2.2 +- 0.4 eV for the total width of the 1s level in the /sup 3/H pionic atom. This value when compared to the measured total width of the 1s level in pionic /sup 3/He implies a small but definite contribution of singlet spin nucleon pairs to absorption of s-wave pions.

• Research Organization: The George Washington University, Washington, DC 20052
• OSTI ID: 5670292
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 37:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOMS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BRANCHING RATIO
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EQUATIONS
FERMIONS
FLUIDS
GASES
HADRON REACTIONS
HADRONIC ATOMS
HADRONS
HELIUM
HELIUM 3 TARGET
HELIUM 4 TARGET
HYDROGEN ISOTOPES
IMPULSE APPROXIMATION
ISOSPIN
ISOTOPES
LIGHT NUCLEI
MESIC ATOMS
MESON REACTIONS
NEUTRONS
NONMETALS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARTIAL WAVES
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION REACTIONS
PIONIC ATOMS
PROBABILITY
PROTONS
RADIOISOTOPES
RARE GASES
S WAVES
SUM RULES
TARGETS
TRITIUM
TRITIUM TARGET
YEARS LIVING RADIOISOTOPES